tweeper.1.asciidoc: mention the supported sites in the man page

diff --git a/tweeper.1.asciidoc b/tweeper.1.asciidoc
index 9cf891b..d6ced90 100644 (file)
--- a/tweeper.1.asciidoc
+++ b/tweeper.1.asciidoc
@@ -28,6 +28,8 @@ The sites that tweeper is able to scrape and convert to RSS are:
 * Twitter.com
 * Pump.io based websites, like Identi.ca
 * Dilbert.com
+* Howtoons.com
+* Instagram.com
 
 tweeper can be used as: